import math

r = 100
for i in range(5):
    a = -2 * math.pi / 5 * i + math.pi / 2
    x = r * math.cos(a)
    y = r * math.sin(a)
    print(x, y)

r = r * math.sin(18 / 360 * 2 * math.pi) / math.cos(36 / 360 * 2 * math.pi)
print(r)
for i in range(5):
    a = -2 * math.pi / 5 * i + 2 * math.pi * 54 / 360
    x = r * math.cos(a)
    y = r * math.sin(a)
    print(x, y)
